Metals and Alloys

Question 1

What IS metals?

Answer 1

• Consist of giant structures of atoms.
• Arranged in regular layers.
• Electrons in the outer shell of each atom are delocalised.
• This creates a sea of delocalised electrons.
• Metals loose outer electron.

Question 2

Property 1 of bonding in metals?

Answer 2

• Strong electrostatic forces of attractions between:
• Sea of delocalised negative electrons
• And positive metal ions.

Question 3

What is an electrostatic forces of attraction?

Answer 3

• Attraction between a positive object and negative object.

Question 4

What are the electrostatic attractions called in metals?

Answer 4

• Metallic bonds.

- Metallic bonds are strong.

Question 5

What is the 2nd property of metals?

Answer 5

• High melting + Boiling Points.

- Great deal of energy is required to break the strong metallic bonds.

Question 6

What is the 3rd property of metals?

Answer 6

• Metals are good conductors of heat and electricty.
• delocalised electrons can move.
• Electrons are charged so can carry electrica; currents and thermal energy.
  so can conduct heat.

Question 7

What is the 4th property of metals?

Answer 7

• Bent + shaped.

- Layers of atoms are able to slide over eachother.

Question 8

What is an Alloy?

Answer 8

• Mixture of metals.
• Different sizes of atoms distort the layers.
• More difficult to slide other eachother.
• Alloys are harder than pure metals.